HxO Tankless Instantaneous Water Heater

Hydronic & Steam Accessories

  • Tankless domestic water heater solution
  • Ideal for packaged skid solutions or standalone installations
  • 15 model sizes available up to 10,000 MBH
  • Stainless Steel Brazed Plate Heat Exchanger
  • Ease of installation and maintenance
  • Efficient operation
  • Highly compact design
  • IntelliFLO technology for ± 2°F setpoint control


The HxO is designed to provide instantaneous domestic hot water supply to your building without the need for additional fuel fired or electric heating equipment. By utilizing your new or existing hotwater heating loop, the HxO will provide on-demand water for your system.


  • Product Overview
  • Related Resources
  • Applications
  • Anti-scaling circulator
  • Inlet strainers
  • Double-walled heat exchanger design
  • 3-way electro-hydraulic modulating valve
  • Full color touchscreen controller with PID set point control
  • Control system includes alarm contacts, data-logging, and Modbus communication
  • Remote monitoring available


The HxO is a packaged, tankless water heater solution that provides optimal energy control between a hydronic boiler loop and a (domestic hot water) DHW or process water. Heat is extracted from the boiler loop through a very compact and efficient heat exchanger and is transferred to the cold domestic water supply. Each HxO model has been designed for an application with the specific flow and temperature ranges on the process and boiler sides. The intelliFLO-enabled PID temperature setpoint control maintains process outlet temperature within +/- 2° F of set point.

  • Domestic Hot Water
  • Industrial Process Water Heatings
  • Indirect Water Heating
  • Eliminating conventionally fired water heaters
  • Optimal energy transfer with a hydronic loop